ADDING MANURE AND FERTILIZERS

MANURE

• Nutrients are added to soil for healthy growth of plants.

• Continuous growing of crops makes the soil poor in nutrients.

• Manures are organic substances obtained from decomposition of plant and animal wastes.

• Manuring is done to replenish soil with nutrients.

+

ORGANIC MANURE

MANURING PROCESS

TRACTOR MANURING THE FIELD

Tractors are used for manuring fields.

ADVANTAGES OF MANURING

• Improves water retaining capacity of the soil. • Makes the soil porous and exchange of gases

becomes easy. • Increases the number of friendly microbes . • Improves the texture of the soil. • Replenishes the soil with necessary nutrients.

FERTILIZERS

• Chemical substances rich in nutrients. • Produced in factories.

E.g.:-

NITROGEN

PHOSPHORUS

POTASSIUM

Green Foliage

Strong Roots

Healthy Growth

N

P

K

• Help farmers to get better yield of crops.

DISADVANTAGES OF FERTILIZERS

1. Source of water pollution. 2. Made the soil less fertile. 3. Artificial fertilizers often cause diseases.

ADVANTAGES OF FERTILIZERS

DIFFERENCES

FERTILIZER MANURE

Inorganic salt Natural substance

Chemical substance Organic substance

Prepared in factories Prepared in fields

Does not humidify the soil Provides humus to the soil

Rich in plant nutrients Less rich in plant nutrients

CONCLUSION

• Manure: organic substances obtained from the decomposition of plant and animal wastes.

• Adding manure to the field shall replenish the soil with nutrients.

• Manuring results in stronger plants and better crops.

• Fertilizers are chemical substances.